diff options
Diffstat (limited to 'drivers/cpuidle/governors/haltpoll.c')
| -rw-r--r-- | drivers/cpuidle/governors/haltpoll.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/cpuidle/governors/haltpoll.c b/drivers/cpuidle/governors/haltpoll.c index cb2a96eafc02..663b7f164d20 100644 --- a/drivers/cpuidle/governors/haltpoll.c +++ b/drivers/cpuidle/governors/haltpoll.c @@ -19,6 +19,7 @@ #include <linux/sched.h> #include <linux/module.h> #include <linux/kvm_para.h> +#include <trace/events/power.h> static unsigned int guest_halt_poll_ns __read_mostly = 200000; module_param(guest_halt_poll_ns, uint, 0644); @@ -90,16 +91,23 @@ static void adjust_poll_limit(struct cpuidle_device *dev, u64 block_ns) if (val > guest_halt_poll_ns) val = guest_halt_poll_ns; + trace_guest_halt_poll_ns_grow(val, dev->poll_limit_ns); dev->poll_limit_ns = val; } else if (block_ns > guest_halt_poll_ns && guest_halt_poll_allow_shrink) { unsigned int shrink = guest_halt_poll_shrink; val = dev->poll_limit_ns; - if (shrink == 0) + if (shrink == 0) { val = 0; - else + } else { val /= shrink; + /* Reset value to 0 if shrunk below grow_start */ + if (val < guest_halt_poll_grow_start) + val = 0; + } + + trace_guest_halt_poll_ns_shrink(val, dev->poll_limit_ns); dev->poll_limit_ns = val; } } |